* Locally ringed spaces are important in the grand scheme of things.
* The Jacobin matrix is a revolutionary way to transform coordinates.
* Shimura curves are really pointless. (source: Hector Pasten)
* There's affine line between good algebraic geometry jokes and bad ones.
* Algebraic geometry: it's Zariski business.
* Model theory is a very satisfying branch of mathematics.
* Algebraic number theorists have some odd reasons for their food choices (in 
  other words, they have nontrivial Chow motives).
* No matter how you slice it, a topos is a topos.
* A wandering monoid in the category of endofunctors would be considered a nomad monad.
* Logicians often discuss their work over a meal of curry. This leads to fewer arguments.
* Discussions about Klein bottles tend to be one-sided.
* Topological K-theory is an extraordinary example of a generalized cohomology theory.
* The discrete topology is fine for most purposes.